/Engine/Source/Runtime/Engine/Public/WorldPartition/NavigationData/NavigationDataChunkActor.h
[TArray](API\Runtime\Core\Containers\TArray)< [TObjectPtr](API\Runtime\Core\Delegates\TObjectPtr)< [UNavigationDataChunk](API\Runtime\Engine\AI\Navigation\UNavigationDataChunk) > > & GetMutableNavDataChunk()